Wall lamp or ceiling lamp industrial window brand "block" France 60s 70s

Wall lamp or ceiling lamp industrial style in the shape of a porthole manufactured by the french brand "bloc" in the 60s and 70s. Height 14cm. Diameter 20cm. Marked "bloc france" on the polypropylene plate and on the glass. E27 large base screw socket, up to 100 w - delivered without bulb. The luminaire is in good condition, clean and in perfect working order.